题目内容
19.All passengers ________ go through safety check before they take a plane.( )| A. | can | B. | may | C. | must | D. | had better |
分析 所有的旅客在乘飞机前必须通过安检.
解答 答案:C.
结合选项可知本题考查情态动词,首先明确选项中每个单词的意思:A:能够;B:可以;C:必须;D:最好; 根据设空处后面的 before they take a plane,结合题干推测句意是"所有的旅客在乘飞机前必须通过安检.",所以must 符合句意,故选C.
点评 本题考查了情态动词的用法.解答时首先根据题干明确句意,理解所给选项中每个情态动词的意思并熟练掌握它们的用法,便可作出正确选择.
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